:root { --bg:#f6f5f1; --surface:#ffffff; --surface-2:#eeede7; --ink:#24231f; --ink-2:#56544c; --muted:#6b685d; --line:#e7e5dc; --line-strong:#d9d6ca; --accent:#5f7c61; --accent-deep:#42584a; --accent-soft:#e6ece1; --ok:#4f9d6b; --danger:#b0594b; --shadow-sm:0 1px 2px rgba(36,35,31,0.05),0 4px 12px rgba(36,35,31,0.05); --radius:18px; --font-display:'Space Grotesk','PingFang SC','Microsoft YaHei',system-ui,sans-serif; --font-body:'Inter','PingFang SC','Microsoft YaHei',system-ui,sans-serif; --font-mono:'IBM Plex Mono','SFMono-Regular',Consolas,monospace; }
* { box-sizing:border-box; } html,body{margin:0;min-height:100%;} body{background:var(--bg);color:var(--ink);font-family:var(--font-body);-webkit-font-smoothing:antialiased;}
body::before{content:'';position:fixed;inset:0;z-index:0;pointer-events:none;opacity:0.04;mix-blend-mode:multiply;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");}
button,input,textarea,select{font:inherit;color:inherit;} button{cursor:pointer;background:none;border:none;padding:0;} a{color:inherit;} :focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;}
.garden{position:fixed;inset:0;z-index:0;overflow:hidden;pointer-events:none;background:radial-gradient(1100px 640px at 82% -8%,rgba(95,124,97,0.1),transparent 62%),radial-gradient(820px 560px at 2% 16%,rgba(95,124,97,0.07),transparent 60%),radial-gradient(960px 720px at 92% 104%,rgba(95,124,97,0.09),transparent 66%);}
.shell{position:relative;z-index:1;min-height:100vh;display:flex;flex-direction:column;}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:18px clamp(20px,5vw,72px);border-bottom:1px solid var(--line);background:var(--bg);position:sticky;top:0;}
.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;} .brand__mark{width:36px;height:36px;display:grid;place-items:center;border-radius:10px;box-shadow:var(--shadow-sm);} .brand__mark svg{width:36px;height:36px;display:block;} .brand__word{display:flex;flex-direction:column;line-height:1.15;} .brand__word strong{font-family:var(--font-display);font-size:16px;font-weight:700;} .brand__word small{margin-top:4px;font-family:var(--font-mono);font-size:9px;letter-spacing:0.22em;color:var(--muted);}
.topbar__meta{display:flex;align-items:center;gap:14px;} .back{font-size:13px;color:var(--muted);text-decoration:none;} .back:hover{color:var(--accent-deep);} .status{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-2);} .status__dot{width:8px;height:8px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 4px rgba(79,157,107,0.14);}
.main{flex:1;width:min(1120px,calc(100% - 40px));margin:0 auto;padding:40px 0 72px;}
.hero{max-width:760px;margin-bottom:36px;} .eyebrow{display:flex;align-items:center;gap:12px;margin:0 0 16px;font-family:var(--font-mono);font-size:12px;letter-spacing:0.16em;color:var(--muted);text-transform:uppercase;} .eyebrow__rule{width:34px;height:2px;background:var(--accent);border-radius:1px;} .hero__title{margin:0 0 14px;font-family:var(--font-display);font-size:clamp(25px,5vw,40px);font-weight:700;line-height:1.05;} .hero__dot{color:var(--accent);} .hero__lead{margin:0;font-size:16px;line-height:1.7;color:var(--ink-2);max-width:640px;}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);overflow:hidden;} .panel__title{margin:0;padding:14px 20px;font-size:12px;font-weight:600;letter-spacing:0.08em;color:var(--ink-2);text-transform:uppercase;background:var(--surface-2);border-bottom:1px solid var(--line);} .panel__body{padding:20px;display:flex;flex-direction:column;gap:18px;}

/* Drop zone */
.drop{border:1.5px dashed var(--line-strong);border-radius:14px;background:var(--surface);padding:34px 20px;text-align:center;cursor:pointer;transition:border-color .18s,background .18s;} .drop:hover,.drop:focus-visible{border-color:var(--accent);background:var(--accent-soft);} .drop.is-over{border-color:var(--accent);background:var(--accent-soft);} .drop__icon{width:38px;height:38px;color:var(--accent);margin-bottom:12px;} .drop__title{font-family:var(--font-display);font-size:16px;font-weight:600;margin:0;} .drop__hint{margin:8px 0 0;font-size:13px;color:var(--muted);}

/* File info */
.fileinfo__grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;} .fi{display:flex;flex-direction:column;gap:4px;padding:12px 14px;background:var(--surface-2);border-radius:10px;} .fi__k{font-family:var(--font-mono);font-size:10px;letter-spacing:0.12em;color:var(--muted);text-transform:uppercase;} .fi__v{font-size:14px;color:var(--ink);word-break:break-all;} @media(max-width:600px){.fileinfo__grid{grid-template-columns:1fr;}}

/* Options */
.options{display:flex;gap:14px;flex-wrap:wrap;align-items:end;} .opt{display:flex;flex-direction:column;gap:6px;min-width:180px;} .opt label{font-family:var(--font-mono);font-size:11px;letter-spacing:0.12em;color:var(--muted);text-transform:uppercase;}
select{height:42px;padding:0 12px;border:1px solid var(--line-strong);border-radius:10px;background:var(--surface);font-size:14px;color:var(--ink);} select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px rgba(95,124,97,0.14);}

/* Actions */
.actions{display:flex;gap:10px;flex-wrap:wrap;} .btn{padding:10px 20px;border-radius:10px;font-size:14px;font-weight:600;background:var(--accent);color:#fff;} .btn:hover{background:var(--accent-deep);} .btn:disabled{opacity:.55;cursor:not-allowed;} .btn--ghost{background:var(--surface);color:var(--ink-2);border:1px solid var(--line-strong);} .btn--ghost:hover{background:var(--surface-2);color:var(--ink);}

/* Progress */
.progress{display:flex;flex-direction:column;gap:8px;} .progress__bar{height:8px;border-radius:999px;background:var(--surface-2);overflow:hidden;} .progress__fill{display:block;height:100%;width:2%;background:var(--accent);border-radius:999px;transition:width .2s ease;} .progress__label{font-size:13px;color:var(--ink-2);}

/* Status */
.statusbar{padding:11px 14px;border-radius:10px;font-size:13px;color:var(--muted);background:var(--surface-2);} .statusbar--ok{color:var(--ok);background:rgba(79,157,107,0.08);} .statusbar--err{color:var(--danger);background:rgba(176,89,75,0.08);}

.footer{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px clamp(20px,5vw,72px);border-top:1px solid var(--line);font-size:12px;color:var(--muted);} @media(max-width:600px){.footer{flex-direction:column;align-items:flex-start;}}